CN110629752A - Deformation compensation anchor rod and using method thereof - Google Patents

Deformation compensation anchor rod and using method thereof Download PDF

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Publication number
CN110629752A
CN110629752A CN201910810992.7A CN201910810992A CN110629752A CN 110629752 A CN110629752 A CN 110629752A CN 201910810992 A CN201910810992 A CN 201910810992A CN 110629752 A CN110629752 A CN 110629752A
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CN
China
Prior art keywords
anchor rod
sleeve
anchor
pin
displacement compensator
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Application number
CN201910810992.7A
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Chinese (zh)
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CN110629752B (en
Inventor
梅岭
丁夏
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Jiangsu University of Science and Technology
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Jiangsu University of Science and Technology
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Priority to CN201910810992.7A priority Critical patent/CN110629752B/en
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    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/74Means for anchoring structural elements or bulkheads
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D2600/00Miscellaneous
    • E02D2600/30Miscellaneous comprising anchoring details

Abstract

The invention discloses a deformation compensation anchor rod and a using method thereof, wherein the deformation compensation anchor rod comprises an anchor rod sleeve and an anchor rod body in the anchor rod sleeve, one end of the anchor rod sleeve is fixedly connected with a screw rod, and the other end of the anchor rod sleeve is provided with an opening; the screw is sequentially provided with a baffle and a fastener matched with the screw, and the baffle is in threaded connection with the screw; a telescopic displacement compensator is arranged in the anchor rod sleeve, one end of the displacement compensator is fixedly connected with the bottom of the anchor rod sleeve, the other end of the displacement compensator is fixedly connected with one end of the anchor rod body, and the other end of the anchor rod body extends out of the opening end of the anchor rod sleeve; when the anchor rod body is subjected to a tensile force, the displacement compensator is extended and provides a reverse tensile force. The anchor rod can be well suitable for small deformation of the side slope, and when the slope body of the side slope deforms greatly, the pin can move enough to support and anchor, so that the service life of the anchor rod is prolonged, and the cost of re-construction of the anchor rod can be reduced; and the production, processing and construction are convenient and fast.

Description

Deformation compensation anchor rod and using method thereof
Technical Field
The invention relates to an anchor rod and a using method thereof, in particular to a deformation compensation anchor rod and a using method thereof.
Background
The slope stability problem is one of three classic problems of soil mechanics, and anchor bolt support compares in other support modes, and the construction is more swift, and low expense is low consuming time moreover, and it is also better to strut the anchor effect. However, under the rainfall working condition, the problem of the falling or collapse of the side slope is caused, and the effect of the conventional anchor rod is not satisfactory.
Chinese patent with publication number CN 105822331 a discloses a resistance-increasing yielding anchor rod, but the problem lies in that: the method for increasing the working resistance by shearing the bolts step by step cannot ensure that the bolts at the two ends of the anchor rod are sheared simultaneously, and if the rod body with unbalanced stress at the two ends is easy to incline, side effects can be generated at any time. Chinese patent No. CN 104653209 a discloses a multi-stage resistance-increasing anchor rod and a construction method, but has the following problems: the design that the front of the cross-shaped wedge at the rear end of the self-expanding device is thick and the rear of the cross-shaped wedge is thin is easy to break at the thinner part of the end part due to stress concentration, so that the whole supporting system is not continuous any more and cannot be constructed continuously.
Disclosure of Invention
The purpose of the invention is as follows: one object of the present invention is to provide a deformation compensation anchor rod, which solves the problem of large deformation of a side slope; it is a further object of the invention to provide a method of using a deformation compensating bolt.
The technical scheme is as follows: the deformation compensation anchor rod comprises an anchor rod sleeve and an anchor rod body in the anchor rod sleeve, wherein one end of the anchor rod sleeve is fixedly connected with a screw rod, and the other end of the anchor rod sleeve is provided with an opening; the screw is sequentially provided with a baffle and a fastener matched with the screw, and the baffle is in threaded connection with the screw; a telescopic displacement compensator is arranged in the anchor rod sleeve, one end of the displacement compensator is fixedly connected with the bottom of the anchor rod sleeve, the other end of the displacement compensator is fixedly connected with one end of the anchor rod body, and the other end of the anchor rod body extends out of the opening end of the anchor rod sleeve; when the anchor rod body is subjected to a tensile force, the displacement compensator is extended and provides a reverse tensile force.
In order to further optimize the effect of the anchor rod, the anchor rod body comprises a connecting shaft and a rod body, a pin is arranged on the outer wall of the connecting shaft and is in threaded connection with the connecting shaft, and a limiting hole matched with the pin is arranged on the outer wall of the anchor rod sleeve to limit the displacement of the anchor rod body and the anchor rod sleeve; the shear strength of the pin is greater than that of the outer wall of the limiting hole around the limiting hole. The shear strength of the anchor rod sleeve material can be selected to be greater than that of the pin. The limiting hole is used for limiting the displacement of the anchor rod body and the anchor rod sleeve, and meanwhile, the shear strength of the outer wall of the limiting hole is smaller than that of the pin, so that certain reverse resistance is provided by the limiting hole when the anchor rod body is subjected to tension; when the pulling force is larger, the outer wall of the limiting hole can be cut off and fall into the next limiting hole, and the limiting hole is kept not to be cut off, so that the step-by-step reverse resistance is provided, and the anchor rod supporting effect is improved.
Preferably, the pins are arranged on the connecting shaft in a left-right symmetrical mode. The bilateral symmetry sets up and makes both ends atress even.
Preferably, the limiting holes are a plurality of limiting holes and are arranged along the movement direction of the pin. The setting up of the spacing hole of a plurality of has formed corresponding a plurality of grades of resistance when making the stock body receive tensile for this anchor bolt support effect is better firm.
Preferably, the spacing between the limiting holes is larger than the width of the pin, and the spacing between the next limiting hole and the previous limiting hole is gradually increased along the moving direction of the pin. First, the spacing is greater than the width of the pins so that the increased resistance is sufficiently large; secondly, the resistance that provides the pin can be makeed gradually to increase gradually to the interval crescent, has improved the effect of strutting of stock.
Preferably, the middle part of the displacement compensator is a corrugated pipe, and the two ends of the displacement compensator are end sealing plates. The corrugated pipe made of elastic metal at the middle part of the displacement compensator can be stretched and retracted, and the reliability is good; the head plate is used for being fixedly connected with the anchor rod sleeve and the anchor rod body.
Preferably, the displacement compensator and the anchor rod sleeve, and the displacement compensator and the anchor rod body are fixedly connected by fasteners. The connection of fastener is reliable stable, can dismantle.
Preferably, the anchor head of the anchor rod body is conical.
Preferably, one side of the baffle plate close to the anchor rod sleeve is provided with a conical base. The conical base can be squeezed into the soil body when the anchor rod is installed on the conical base.
The invention also provides a using method of the deformation compensation anchor rod, which comprises the following steps:
(1) clearing the side slope for leveling, and then drilling and positioning;
(2) assembling an anchor rod: placing the displacement compensator into the anchor rod sleeve, and fixedly connecting two ends of the displacement compensator with the anchor rod sleeve and the anchor rod body respectively by adopting fasteners; installing a pin and enabling the pin to extend into a first limiting hole far away from the anchor head;
(3) feeding the anchor rod: after cleaning the hole, the anchor rod is inspected to be qualified and is sent into the hole, so that the screw on the sleeve of the anchor rod leaks out of the soil body;
(4) grouting in the hole: grouting along one end of the rod body by pressure grouting until the grout overflows from the grouting port;
(5) fixing the anchor rod: and a baffle and a fastener are sequentially arranged on the screw rod, so that the baffle is tightly attached to the soil body, and the anchor rod is firmly arranged.
The invention principle of the invention is as follows: by introducing the combination of the displacement compensator and the pin limiting hole, multi-stage protection is formed; after the anchor rod is sent into the inside of drilling, side slope along with the lapse of time, the displacement accumulates gradually, and the small displacement in the soil body warp, and the displacement compensator can absorb partial deformation, increases when the initial length of anchor rod is not enough to bear when the displacement deflection, and the axial tension displacement can be realized through the filler on the extrusion sleeve to the pin on the anchor rod body, guarantees that the anchor rod can continue to use when the big deformation, has both increased the life of anchor rod, can reduce the cost that the anchor rod was under construction once more again.
Has the advantages that:
(1) the anchor rod can well solve the problem of large deformation slope caused by rainfall, and when the soil body slides downwards or is subjected to large displacement caused by earthquake action while the primary support anchoring effect is ensured, the anchor rod can extend along with the displacement, and still has good support effect;
(2) the anchor rod can be well suitable for small deformation of the side slope, and when the slope body of the side slope deforms greatly, the pin can move enough to support and anchor, so that the service life of the anchor rod is prolonged, and the cost of re-construction of the anchor rod can be reduced;
(3) the deformation compensation anchor rod is convenient and quick to produce, process and construct.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic view of the construction of the anchor shank and the high strength connecting bolt;
FIG. 3 is a schematic diagram of a displacement compensator;
fig. 4 is a schematic view of the anchor sleeve and the baffle.
Detailed Description
As shown in fig. 1 to 4, the deformation compensation anchor rod of the present invention includes an anchor rod sleeve 2 and an anchor rod body 1 in the anchor rod sleeve 2, wherein a screw 23 is fixedly connected to a left end of the anchor rod sleeve 2, the screw 23 is exposed out of a soil body, and a right end of the anchor rod sleeve 2 is open; the screw 23 is sequentially provided with a baffle 4 and a fastener 5 matched with the screw 23, the fastener 5 shown in the figure is an octagonal bolt, the baffle 4 is in threaded connection with the screw 23, and the right side surface of the baffle 4 is provided with a conical base 41; a telescopic displacement compensator 6 is arranged in the anchor rod sleeve 2, the middle part of the displacement compensator 6 is a corrugated pipe 64 made of elastic metal, two ends of the corrugated pipe 64 are provided with head sealing plates 61, and bolt holes 62 and 63 are uniformly formed in the head sealing plates 61; one end of the displacement compensator 6 is fixedly connected with the bottom of the anchor rod sleeve 2, the other end of the displacement compensator is fixedly connected with one end of the anchor rod body 1, and the other end of the anchor rod body 1 extends out of the opening end of the anchor rod sleeve 2. The bottom of the anchor rod sleeve 2 is provided with a bolt connecting hole 22 corresponding to the position of the head plate 61, and the head plate 61 and the bottom of the anchor rod sleeve 2 are fixedly connected by adopting a high-strength connecting bolt 3. When the mooring body is subjected to a tensile force, the displacement compensator 6 elongates and provides a counter-tension. The high-strength connecting bolt is shown in fig. 2 and comprises a screw 31, a nut 32 and a nut 33, wherein the screw 31 is provided with threads.
The anchor rod body 1 comprises a connecting shaft 14 and a rod body 13 which are integrated, threads 12 are arranged on the rod body 13, a connecting base plate 143 is arranged at the left end of the connecting shaft 14, a connecting hole 142 is formed in the connecting base plate 143, the connecting hole 142 corresponds to a bolt hole 63 in a head plate 61 at the right end of the displacement compensator 6, and the connecting hole 142 and the bolt hole are fixedly connected through a high-strength connecting bolt 3. Pins 141 are symmetrically arranged on two sides of the connecting shaft 14, the pins 141 are made of high-strength metal, the pins 141 are in threaded connection with the connecting shaft 14, five limiting holes 21 matched with the pins 141 are formed in the outer wall of the anchor rod sleeve 2 so as to limit the displacement of the anchor rod body 1 and the anchor rod sleeve 2, and the limiting holes 21 are arranged along the moving direction of the pins 141; and the shear strength of the pin 141 is greater than that of the outer wall 24 of the limiting hole on the outer wall of the anchor rod sleeve 2, so that when the anchor rod is stressed and deforms greatly, the rod body 13 is ensured to be capable of shearing off the outer wall 24 around the limiting hole through the pin 141 and then moves axially along the anchor rod sleeve 2. The five limiting holes 21 are arranged in the moving direction of the pin 141, the distance between each limiting hole 21 is larger than the width of the pin 141, and the distance between the next limiting hole 21 and the previous limiting hole 21 is gradually increased along the moving direction of the pin 141, so that the resistance provided for the pin 141 is gradually increased, and the supporting effect of the anchor rod is improved. If the axial length of the outer wall of the anchor rod sleeve 2 is not enough, the limiting holes 21 can be uniformly distributed.
Because the middle corrugated pipe 64 of the displacement compensator 6 is made of elastic metal, the expansion and compression are allowed when the external force is applied, when the anchor rod is pulled in the side slope, the middle corrugated pipe 64 can compensate the displacement deformation of a part of the anchor rod, when the deformation is overlarge, the pin 141 can extrude the outer wall 24 filling the limiting hole to generate axial displacement later, but due to the quantity of the limiting holes 21 and the arrangement of the spacing, the anchor rod can support and reinforce soil after the deformation.
When the deformation compensation anchor rod is installed and used, the method comprises the following steps:
(1) leveling: clearing weeds, floating soil, broken stones and the like on the side slope;
(2) drilling and positioning: measuring and positioning, positioning a drilling machine, and drilling;
(3) assembling an anchor rod: placing the displacement compensator 6 into the anchor rod sleeve 2, and fixedly connecting two ends of the displacement compensator 6 with the anchor rod sleeve 2 and the anchor rod body 1 respectively by adopting high-strength connecting bolts 3; a pin 141 is installed afterwards, the pin 141 is extended into the first limiting hole 21 far away from the anchor head, and then the pin is screwed on the connecting shaft 14 on the anchor rod body 1;
(4) feeding the anchor rod: after cleaning the hole, the anchor rod is qualified and is sent into the hole;
(5) grouting in the hole: grouting along one end of the rod body by pressure grouting until the grout overflows from the grouting port;
(6) installing a baffle: the baffle 4 penetrates through the exposed screw 23 of the anchor rod sleeve 2, and the conical base 41 on the right side of the baffle 4 is extruded into soil;
(7) fixing the anchor rod: the octagonal bolt is sleeved on the screw 23 and screwed tightly to be tightly attached to the baffle 4, and the installation is firm and reliable.

Claims (10)

1. A deformation compensation stock which characterized in that: the anchor rod comprises an anchor rod sleeve (2) and an anchor rod body (1) in the anchor rod sleeve (2), wherein one end of the anchor rod sleeve (2) is fixedly connected with a screw rod (23), and the other end of the anchor rod sleeve (2) is opened; the screw rod (23) is sequentially provided with a baffle (4) and a fastener (5) matched with the screw rod (23), and the baffle (4) is in threaded connection with the screw rod (23); a telescopic displacement compensator (6) is arranged in the anchor rod sleeve (2), one end of the displacement compensator (6) is fixedly connected with the bottom of the anchor rod sleeve (2), the other end of the displacement compensator is fixedly connected with one end of the anchor rod body (1), and the other end of the anchor rod body (1) extends out of the opening end of the anchor rod sleeve (2); when the anchor rod body (1) is subjected to a tensile force, the displacement compensator (6) extends and provides a counter-tensile force.
2. A deformation compensating bolt according to claim 1, wherein: the anchor rod body (1) comprises a connecting shaft (14) and a rod body (13), a pin (141) is arranged on the outer wall of the connecting shaft (14), the pin (141) is in threaded connection with the connecting shaft (14), and a limiting hole (21) matched with the pin (141) is arranged on the outer wall of the anchor rod sleeve (2); the shear strength of the pin (141) is greater than that of the outer wall (24) of the limiting hole around the limiting hole (21).
3. A deformation compensating bolt according to claim 2, wherein: the pins (141) are arranged on the connecting shaft (14) in a left-right symmetrical mode.
4. A deformation compensating bolt according to claim 2, wherein: the limiting holes (21) are arranged in the moving direction of the pin (141).
5. A deformation compensating bolt according to claim 4, wherein: the spacing between the limiting holes (21) is larger than the width of the pins (141); and along the movement direction of the pin (141), the distance between the next limiting hole (21) and the previous limiting hole (21) is gradually increased.
6. A deformation compensating bolt according to claim 1, wherein: the middle part of the displacement compensator (6) is a corrugated pipe (64), and the two ends of the displacement compensator are end sealing plates (61).
7. A deformation compensating bolt according to claim 1, wherein: and the displacement compensator (6) is fixedly connected with the anchor rod sleeve (2) and the displacement compensator (6) is fixedly connected with the anchor rod body (1) by adopting a fastener (5).
8. A deformation compensating bolt according to claim 1, wherein: the anchor head (11) of the anchor rod body (1) is conical.
9. A deformation compensating bolt according to claim 1, wherein: one side of the baffle plate (4) close to the anchor rod sleeve (2) is provided with a conical base (41).
10. A method of using a deformation compensating bolt according to claim 1, including the steps of:
(1) clearing the side slope for leveling, and then drilling and positioning;
(2) assembling an anchor rod: placing the displacement compensator into the anchor rod sleeve, and fixedly connecting two ends of the displacement compensator with the anchor rod sleeve and the anchor rod body respectively by adopting fasteners; installing a pin and enabling the pin to extend into a first limiting hole far away from the anchor head;
(3) feeding the anchor rod: after cleaning the hole, the anchor rod is sent into the hole after being checked to be qualified, and the screw rod on the sleeve of the anchor rod is exposed out of the soil body;
(4) grouting in the hole: grouting along one end of the rod body by pressure grouting until the grout overflows from the grouting port;
(5) fixing the anchor rod: and a baffle and a fastener are sequentially arranged on the screw rod, so that the baffle is tightly attached to the soil body, and the anchor rod is firmly arranged.
CN201910810992.7A 2019-08-29 2019-08-29 Deformation compensation anchor rod and using method thereof Active CN110629752B (en)

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CN110629752B CN110629752B (en) 2021-06-25

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111441804A (en) * 2020-04-07 2020-07-24 中国矿业大学 Anti-inclination yielding large-deformation anchoring device and use method thereof

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08134923A (en) * 1994-11-08 1996-05-28 Fujita Corp Cut surface stabilizing construction method
CN102359386A (en) * 2011-10-28 2012-02-22 湖南科技大学 Shearing sleeve type yielding bolt
CN105626112A (en) * 2016-01-08 2016-06-01 尤洛卡(山东)深部地压防治安全技术有限公司 Support device based on built-in type constant-resistance device and use method thereof
CN206233942U (en) * 2016-12-07 2017-06-09 山西潞安环保能源开发股份有限公司 Frictional spring pressure-relieving achor bar
CN106894835A (en) * 2017-03-16 2017-06-27 湖南大学 A kind of pressure-relieving achor bar
CN206571514U (en) * 2017-03-17 2017-10-20 湖南科技大学 A kind of segmented large deformation pressure-relieving achor bar
CN206903682U (en) * 2017-07-12 2018-01-19 广西路桥工程集团有限公司 One kind increases resistance pressure-relieving achor bar

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08134923A (en) * 1994-11-08 1996-05-28 Fujita Corp Cut surface stabilizing construction method
CN102359386A (en) * 2011-10-28 2012-02-22 湖南科技大学 Shearing sleeve type yielding bolt
CN105626112A (en) * 2016-01-08 2016-06-01 尤洛卡(山东)深部地压防治安全技术有限公司 Support device based on built-in type constant-resistance device and use method thereof
CN206233942U (en) * 2016-12-07 2017-06-09 山西潞安环保能源开发股份有限公司 Frictional spring pressure-relieving achor bar
CN106894835A (en) * 2017-03-16 2017-06-27 湖南大学 A kind of pressure-relieving achor bar
CN206571514U (en) * 2017-03-17 2017-10-20 湖南科技大学 A kind of segmented large deformation pressure-relieving achor bar
CN206903682U (en) * 2017-07-12 2018-01-19 广西路桥工程集团有限公司 One kind increases resistance pressure-relieving achor bar

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111441804A (en) * 2020-04-07 2020-07-24 中国矿业大学 Anti-inclination yielding large-deformation anchoring device and use method thereof
CN111441804B (en) * 2020-04-07 2021-02-19 中国矿业大学 Anti-inclination yielding large-deformation anchoring device and use method thereof

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